these 2 derivations will be built:
  /nix/store/n55k0bigns1cbnl0r3rfw5gsplacgc6i-nix-grpc-store-0.1.0-beta.4.drv
  /nix/store/wn3xy7m3aw45xd3fd18q2hjqfk6yj3h8-nix-grpc-store-exit-stress.drv